CVE-2026-72358

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72358", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.921Z", "datePublished": "2026-08-15T05:55:58.783Z", "dateUpdated": "2026-08-17T05:43:16.546Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:43:16.546Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/pt: prevent invalid cursor access for purged BOs\n\nDuring a page table walk for binding, xe_pt_stage_bind() explicitly\nskips initializing the xe_res_cursor for purged BOs, treating them\nsimilarly to NULL VMAs by only setting the cursor size.\n\nHowever, xe_pt_hugepte_possible() and xe_pt_scan_64K() did not check\nif the BO was purged before attempting to walk the cursor using\nxe_res_dma() and xe_res_next(). Because the cursor was left\nuninitialized for purged BOs, this falls through and triggers\nwarnings like:\n\n WARNING: drivers/gpu/drm/xe/xe_res_cursor.h:274 at xe_res_next\n\nFix this by explicitly checking if the BO is purged in both\nxe_pt_hugepte_possible() and xe_pt_scan_64K(), returning early just\nas we do for NULL VMAs, avoiding the invalid cursor accesses entirely.\n\nAs a precaution, also zero-initialize the cursor in xe_pt_stage_bind()\nto ensure we don't pass garbage data into the page table walkers\nif we ever hit a similar edge case in the future.\n\n(cherry picked from commit 4c7b9c6ece32440e5a435a92076d049450cd2d2e)"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Exploitation requires local ioctl access to the Intel Xe DRM render node (/dev/dri/renderD*) via XE_VM_BIND and XE_MADVISE to drive purged-buffer page-table rebinds through xe_pt_stage_bind(); this path is not reachable over the network or without local GPU device access.\nAC:L - An attacker controls the full trigger sequence\u2014marking BOs DONTNEED via madvise, inducing memory pressure to purge backing store, and forcing rebind\u2014so the uninitialized-cursor walk is reliably reachable without races or conditions outside attacker influence.\nPR:L - Only standard unprivileged local access to the DRM render node is required (typical render/video group membership on desktops, cloud GPU instances, and shared workstations); no real root/CAP_SYS_ADMIN and user namespaces do not grant additional reach.\nUI:N - No victim or administrator interaction is needed; the attacker drives the entire sequence through their own DRM ioctls and deliberate memory-pressure to purge and rebind their own mapped buffer objects.\nS:U - Impact is kernel memory corruption and denial-of-service within the same OS security boundary (potential local privilege escalation), not a VM escape, IOMMU/DMA boundary bypass, or cross-tenant isolation break.\nC:H - xe_pt_hugepte_possible() and xe_pt_scan_64K() read uninitialized xe_res_cursor stack fields via xe_res_dma()/xe_res_next() on purged BOs, constituting kernel memory corruption that can leak adjacent stack/heap data or skew page-table decisions.\nI:H - Garbage cursor mem_type/node pointers drive buddy-allocator list traversal during page-table walks, enabling kernel heap metadata corruption and potential arbitrary write or control-flow hijack primitives beyond the intended safe NULL/scratch PTE rebind path.\nA:H - Invalid cursor traversal triggers XE_WARN_ON in xe_res_next and can dereference corrupt buddy-list pointers during purged-BO rebind, causing kernel warnings, oops, or panic and denying GPU and system availability."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/xe/xe_pt.c"], "versions": [{"version": "ad9843aac91a1eda12912a4922042ea04cfc29dc", "lessThan": "2b6b3f98d0e93856bee38699b783c71cb0e9d67f", "status": "affected", "versionType": "git"}, {"version": "ad9843aac91a1eda12912a4922042ea04cfc29dc", "lessThan": "8a0fb57675be578c4db19deb4298ed08a70f0f1a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/xe/xe_pt.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2b6b3f98d0e93856bee38699b783c71cb0e9d67f"}, {"url": "https://git.kernel.org/stable/c/8a0fb57675be578c4db19deb4298ed08a70f0f1a"}], "title": "drm/xe/pt: prevent invalid cursor access for purged BOs", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/xe/xe_pt.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2b6b3f98d0e93856bee38699b783c71cb0e9d67f", "status": "affected", "version": "ad9843aac91a1eda12912a4922042ea04cfc29dc", "versionType": "git"}, {"lessThan": "8a0fb57675be578c4db19deb4298ed08a70f0f1a", "status": "affected", "version": "ad9843aac91a1eda12912a4922042ea04cfc29dc", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/xe/xe_pt.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/pt: prevent invalid cursor access for purged BOs\n\nDuring a page table walk for binding, xe_pt_stage_bind() explicitly\nskips initializing the xe_res_cursor for purged BOs, treating them\nsimilarly to NULL VMAs by only setting the cursor size.\n\nHowever, xe_pt_hugepte_possible() and xe_pt_scan_64K() did not check\nif the BO was purged before attempting to walk the cursor using\nxe_res_dma() and xe_res_next(). Because the cursor was left\nuninitialized for purged BOs, this falls through and triggers\nwarnings like:\n\n WARNING: drivers/gpu/drm/xe/xe_res_cursor.h:274 at xe_res_next\n\nFix this by explicitly checking if the BO is purged in both\nxe_pt_hugepte_possible() and xe_pt_scan_64K(), returning early just\nas we do for NULL VMAs, avoiding the invalid cursor accesses entirely.\n\nAs a precaution, also zero-initialize the cursor in xe_pt_stage_bind()\nto ensure we don't pass garbage data into the page table walkers\nif we ever hit a similar edge case in the future.\n\n(cherry picked from commit 4c7b9c6ece32440e5a435a92076d049450cd2d2e)"}], "id": "CVE-2026-72358", "lastModified": "2026-08-17T06:18:39.997", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:09.243", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b6b3f98d0e93856bee38699b783c71cb0e9d67f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8a0fb57675be578c4db19deb4298ed08a70f0f1a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/xe/pt: prevent invalid cursor access for purged BOs", "id": "2516686", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516686"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-824", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/xe/pt: prevent invalid cursor access for purged BOs\nDuring a page table walk for binding, xe_pt_stage_bind() explicitly\nskips initializing the xe_res_cursor for purged BOs, treating them\nsimilarly to NULL VMAs by only setting the cursor size.\nHowever, xe_pt_hugepte_possible() and xe_pt_scan_64K() did not check\nif the BO was purged before attempting to walk the cursor using\nxe_res_dma() and xe_res_next(). Because the cursor was left\nuninitialized for purged BOs, this falls through and triggers\nwarnings like:\nWARNING: drivers/gpu/drm/xe/xe_res_cursor.h:274 at xe_res_next\nFix this by explicitly checking if the BO is purged in both\nxe_pt_hugepte_possible() and xe_pt_scan_64K(), returning early just\nas we do for NULL VMAs, avoiding the invalid cursor accesses entirely.\nAs a precaution, also zero-initialize the cursor in xe_pt_stage_bind()\nto ensure we don't pass garbage data into the page table walkers\nif we ever hit a similar edge case in the future.\n(cherry picked from commit 4c7b9c6ece32440e5a435a92076d049450cd2d2e)", "A flaw was found in the Linux kernel's `drm/xe/pt` component. During page table walks for binding, specific functions (`xe_pt_hugepte_possible()` and `xe_pt_scan_64K()`) do not properly check if a Buffer Object (BO) has been purged. This oversight can lead to invalid access of an uninitialized cursor, potentially triggering kernel warnings and causing system instability or a denial of service."], "name": "CVE-2026-72358", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72358\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72358\nhttps://lore.kernel.org/linux-cve-announce/2026081513-CVE-2026-72358-0eca@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ad9843aac91a1eda12912a4922042ea04cfc29dc,2b6b3f98d0e93856bee38699b783c71cb0e9d67f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ad9843aac91a1eda12912a4922042ea04cfc29dc,8a0fb57675be578c4db19deb4298ed08a70f0f1a)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T20:15:02.780489+00:00", "updated": "2026-08-22T05:30:17.955917+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-665", "CWE-824"]}